A bifunctional dental bur

Abstract

The utility model relates to dental instrument technical field discloses a double -functional dental car needle, including cutting head and grinding work department, cutting head is set up in one end of grinding work department through transition neck part, the other end of grinding work department is installed on the handle, and cutting head is used for penetrating tooth enamel / dentin, and transition neck part is the gradually changing diameter structure for realizing mechanical buffer, and the surface of grinding work department is plated with diamond particle, and radial circle runout is 0.07-0.12mm, and the spiral groove for discharging the chippings is equipped on grinding work department. The utility model has three functional areas of cutting head, transition neck part and grinding work department, makes single car needle to have efficient cutting (open pulp, remove caries) and fine polishing (dental preparation polishing) ability simultaneously, can satisfy efficient cutting and fine polishing demand simultaneously, replaces traditional two kinds of special car needle, eliminates the process interruption caused by replacing the tool in clinical operation, and can simplify the diagnosis and treatment operation process, significantly improves work efficiency and treatment coherence.

Description

Technical Field

[0001] This utility model relates to the field of dental instrument technology, and more specifically to a dual-function dental bur. Background Technology

[0002] Dental burs are crucial tools used in clinical procedures such as cutting and polishing hard dental tissues. Currently, clinically used burs are mainly divided into two categories, each with its own functional focus but also significant limitations: Tungsten carbide burs: Due to the high strength of tungsten carbide, they possess excellent cutting capabilities and are widely used in procedures requiring rapid removal of hard tooth tissue, such as pulpotomy and caries removal. However, their grinding precision is relatively low, resulting in a rough tooth surface after machining. Furthermore, they are prone to generating a large amount of heat during high-speed cutting, which may cause potential damage to the dental pulp tissue.

[0003] Diamond burs: These burs achieve fine grinding through a surface coating of diamond particles and are often used in applications requiring high precision, such as tooth preparation and polishing. However, these burs have low cutting efficiency, making them unsuitable for rapid removal of hard tissues. Furthermore, the complex diamond coating process results in significantly higher production costs compared to tungsten carbide burs, increasing clinical procurement costs.

[0004] Because the two types of needles mentioned above are complementary but cannot substitute for each other, they need to be frequently changed according to the treatment steps in clinical practice. This not only interrupts the operation process and prolongs the time of a single treatment session, but also increases patient discomfort. At the same time, medical institutions need to purchase and stock both types of needles simultaneously, which increases procurement costs and inventory management complexity. In addition, the repeated loading and unloading of instruments during multiple needle changes may affect the stability of the operation, indirectly increasing the risk of diagnosis and treatment. Utility Model Content

[0005] In view of this, the present invention provides a dual-function dental bur that can simultaneously meet the needs of efficient cutting and fine polishing, and can simplify the diagnostic and treatment process.

[0006] To achieve the above objectives, the present invention provides a dual-function dental bur, comprising a cutting head and a grinding working part. The cutting head is disposed at one end of the grinding working part via a transition neck, and the other end of the grinding working part is mounted on a shank.

[0007] Preferably, the cutting head is tapered or cylindrical in design to penetrate the enamel and dentin.

[0008] Preferably, the cutting head has a bent structure, and the curvature of the cutting head is 15°-30°.

[0009] Preferably, the cutting head is made of tungsten carbide.

[0010] Preferably, the transition neck has a gradually changing diameter structure to achieve mechanical cushioning.

[0011] Preferably, the surface of the grinding workpiece is coated with diamond particles for fine grinding.

[0012] Preferably, the handle is made of tungsten steel with a hardness ≥500HV.

[0013] Preferably, the radial runout of the dual-function dental bur is ≤0.07-0.12mm.

[0014] Preferably, the length of the grinding working part is 35%-45% of the total length of the bur.

[0015] Preferably, the grinding working part is provided with a spiral groove, which is used to discharge chips.

[0016] As can be seen from the above technical solution, compared with the prior art, the dual-function dental bur provided by this utility model has the following beneficial effects: 1. Integrates cutting and grinding functions, completely solving the problem of frequent needle changes. This invention enables a single bur to simultaneously possess efficient cutting (accessory access, caries removal) and fine grinding (tooth preparation and polishing) capabilities through three functional areas: the cutting head, the transition neck, and the grinding working section. It replaces the two traditional types of dedicated burs, eliminates process interruptions caused by tool changes during clinical operations, and significantly improves work efficiency and treatment continuity.

[0017] 2. Optimize mechanical properties and dynamic stability to improve operational safety. The transition neck of this invention buffers stress through a diameter gradient design, and enhances the bonding strength between the tungsten steel substrate and the diamond layer by combining CVD coating technology, forming a "cutting-buffering-grinding" mechanical transmission chain to reduce the risk of instrument breakage. The radial runout of this invention is ≤0.07-0.12mm, which reduces the offset during high-speed rotation, avoids accidental damage to tooth tissue, and especially reduces the risk of pulp damage caused by instrument instability.

[0018] 3. Significantly extends service life and reduces overall costs. This invention optimizes the structure and extends the lifespan of the needle compared to traditional single-material needles. At the same time, replacing two types of needles with a single needle reduces the variety of needles purchased and the quantity of inventory, thereby lowering procurement costs and sterilization frequency, and indirectly reducing the operating expenses of medical institutions.

[0019] 4. Expand clinical application scenarios to meet high-precision requirements This invention combines efficient cutting and fine grinding capabilities, making it suitable for scenarios with strict requirements for precision and efficiency, such as implant guide trimming, implant trimming, and crown and bridge preparation. It breaks through the application limitations caused by the single function of traditional burs and promotes the development of dental instruments towards integration. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the dual-function dental bur of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1-cutting head, 2-transition neck, 3-grinding working part, 4-shank. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of an exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] like Figure 1 As shown, the dual-function dental bur provided by this utility model is used for cutting and polishing hard tooth tissues. It includes a handle 4 for handheld use and three functional zones mounted on the handle 4. Section A - Cutting head 1, made of tungsten carbide (cesium steel), with a conical or cylindrical design, is used to penetrate the enamel and dentin during treatment; Zone B - Transitional Neck 2: Employs a diameter-gradient structure to provide mechanical cushioning during diagnosis and treatment; Section C - Grinding Work Section 3: Surface coated with diamond particles, responsible for fine grinding during the diagnosis and treatment process.

[0025] The cutting head 1 and the grinding working part 3 are connected by a transition neck 2. One end of the grinding working part 3 is connected to the transition neck 2, and the other end is connected to the shank 4. The length of the grinding working part 3 is 35%-45% of the total length of the bur.

[0026] Diamond particles on the surface of the grinding workpiece 3 are uniformly deposited onto the tungsten steel substrate by chemical vapor deposition (CVD), meeting the requirements of "no white spots in the coating and impurities <0.5mm²".

[0027] The tungsten carbide handle 4 has a hardness of ≥500HV and is free of scratches and rust spots.

[0028] Dynamic accuracy: Radial runout ≤0.07-0.12mm (graded according to color markings: green ≤0.12, blue ≤0.1, red ≤0.08, yellow ≤0.07), ensuring high-speed rotational stability.

[0029] The processing steps of the dual-function dental bur provided by this utility model are as follows: Tungsten steel substrate processing → laser etching of color marks (red / yellow mark corresponding to a jump of ≤0.08 / 0.07mm) → CVD deposition of diamond layer (thickness 50-100μm).

[0030] It should be noted that the total length, diameter, and other parameters of the bur are adjusted according to clinical needs so that the actual size of the bur can be adapted to different customers, thereby improving the treatment effect and user experience.

[0031] Example 1: In this embodiment, the dual-function dental bur provided by this utility model has a straight shank structure, the diameter of the shank 4 is Φ2.35±0.06, the overall length of the cutting head 1, transition neck 2, grinding working part 3 and shank 4 is 19±0.5, and the length of the grinding working part 3 is 42% of the total length of the bur.

[0032] Example 2: Unlike Embodiment 1, the cutting head 1 in this embodiment adopts a curved structure, which is particularly suitable for treatment operations in the posterior tooth region. In this embodiment, the curvature of the cutting head 1 is 15°-30°.

[0033] To further optimize the above technical solution, a spiral groove was added to the grinding workpiece 3 to improve the chip removal efficiency.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0036] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-function dental bur, characterized in that, It includes a cutting head (1) and a grinding working part (3), wherein the cutting head (1) is disposed at one end of the grinding working part (3) via a transition neck (2), and the other end of the grinding working part (3) is mounted on a shank (4).

2. The dual-function dental bur according to claim 1, characterized in that, The cutting head (1) is a tapered or cylindrical design for penetrating tooth enamel and dentin.

3. The dual-function dental bur according to claim 1, characterized in that, The cutting head (1) is a bent structure, and the curvature of the cutting head (1) is 15°-30°.

4. The dual-function dental bur according to claim 1, characterized in that, The cutting head (1) is made of tungsten steel.

5. The dual-function dental bur according to claim 1, characterized in that, The transition neck (2) is a gradually changing diameter structure used to achieve mechanical buffering.

6. The dual-function dental bur according to claim 1, characterized in that, The surface of the grinding workpiece (3) is coated with diamond particles for fine grinding.

7. The dual-function dental bur according to claim 1, characterized in that, The handle (4) is made of tungsten steel with a hardness ≥500HV.

8. The dual-function dental bur according to claim 1, characterized in that, Its radial runout is ≤0.07-0.12mm.

9. The dual-function dental bur according to claim 1, characterized in that, The length of the grinding working part (3) is 35%-45% of the total length of the needle.

10. The dual-function dental bur according to claim 1, characterized in that, The grinding workpiece (3) is provided with a spiral groove, which is used to discharge chips.

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